What happened
On July 17, 2011, at approximately 14:15 UTC, a paraglider accident occurred near the summit of Černá hora. The pilot was flying a NOVA FACTOR paraglider in strong southwest winds characterized by gusts, preceding a visible cold front.
Witnesses, including other paraglider pilots, observed the pilot flying near the ridge. Around 14:00 UTC, witnesses attempted to warn the pilot via radio that the weather conditions were deteriorating and advised him to increase his airspeed to move away from the ridge. Although the pilot acknowledged the warning by manipulating his wing edges, he continued his flight path. Eventually, the pilot turned further toward the lee side of the mountain and disappeared behind the horizon.
As the pilot entered the lee side of the mountain, the aircraft lost forward airspeed and was pushed into intensifying rotor turbulence. The pilot maintained active control of the collapsing wing but ultimately lost control near the ground. The aircraft likely struck a tree stump and the terrain during a pendulum motion, resulting in one fatality.